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Vehicles carry only one spare.
You need a minimum of 2 Z nails, one for each curbside wheel of the vehicle that blocks your driveway or impedes access to your property.
Seriously though, how much parking space do you require? Do you not have your own driveway/ carpark?
Down this way, no one person has any right to sole parking outside their own property. Although it is loosely held/not enforced that area outside the home premises is for use of the occupier